Coal metamorphism in the upper portion of the Pennsylvanian Sturgis Formation in Western Kentucky
Journal Article
·
· Geol. Soc. Am., Bull.; (United States)
Coals from the Pennsylvanian upper Sturgis Formation (Mississippian and Virginian) were sampled from a borehole in Union County, western Kentucky. The coals exhibited two discrete levels of metamorphism. The lower rank coals of high-volatile C bituminous rank were assumed to represent the normal level of metamorphism. A second set of coals of high-volatile A bituminous rank was found to be associated with sphalerite, chlorite, and twinned calcite. The latter mineral assemblages indicate that hydrothermal metamorphism was responsible for the anomalous high rank. Consideration of the sphalerite fluid-inclusion temperatures from nearby ores and coals and the time - temperature aspects of the coal metamorphism suggests that the hydrothermal metamorphic event was in the 150 to 200 C range for a brief time (10/sup 5/-10/sup 5/and yr), as opposed to the longer term (25-50m yr) 60 to 75 C ambient metamorphism.
- OSTI ID:
- 6659202
- Journal Information:
- Geol. Soc. Am., Bull.; (United States), Journal Name: Geol. Soc. Am., Bull.; (United States) Vol. 94:12; ISSN BUGMA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Association of coal metamorphism and hydrothermal mineralization in Rough Creek fault zone and Fluorspar District, Western Kentucky
Petrography of the Paradise (No. 12), Baker (No. 13) and Coiltown (No. 14) coals of the Lower portion of the Sturgis Formation (Pennsylvanian) in Western Kentucky
Petrography of the Herrin (No. 11) coal in western Kentucky
Conference
·
Thu Sep 01 00:00:00 EDT 1983
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6561274
Petrography of the Paradise (No. 12), Baker (No. 13) and Coiltown (No. 14) coals of the Lower portion of the Sturgis Formation (Pennsylvanian) in Western Kentucky
Journal Article
·
Wed Nov 30 23:00:00 EST 1983
· Geol. Soc. Am., Bull.; (United States)
·
OSTI ID:6659208
Petrography of the Herrin (No. 11) coal in western Kentucky
Journal Article
·
Mon Jun 01 00:00:00 EDT 1981
· Res. Rep. - N.Y. State Dep. Transp., Eng. Res. Dev. Bur.; (United States)
·
OSTI ID:5178540
Related Subjects
01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
COAL
COAL DEPOSITS
COAL RANK
ENERGY SOURCES
FEDERAL REGION IV
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
KENTUCKY
MATERIALS
METAMORPHISM
MINERAL RESOURCES
NORTH AMERICA
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PETROLOGY
RESOURCES
USA
010600* -- Coal
Lignite
& Peat-- Properties & Composition
011000 -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
COAL
COAL DEPOSITS
COAL RANK
ENERGY SOURCES
FEDERAL REGION IV
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
KENTUCKY
MATERIALS
METAMORPHISM
MINERAL RESOURCES
NORTH AMERICA
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PETROLOGY
RESOURCES
USA